Following these discussions and for a future release (0.8)
I made an implementation in my Nautilus plugin of stable positions of a list of objects. In order to work it needs some geometries that are closed (volume and centroid calculation). Using Pack it is possible to see all the stables positions.
Cow is funny, 9 stable positions
I also added a 3d convex hull, not a lot of news except that it accept many type of geometries (point, curve, brep, surface …). This rely on Grasshopper SDK tool GH_convert.ToMesh( …)
As Easter is approaching I added some eggs
Also I add coloring if multiple meshes are outputted